Incandescent-lamp control.



PATENTED FEB. 18, 1908. R. E. KIMBALL. INUANDESGENT LAMP CONTROL.

APPLICATION FILED MAR. 30, 1906.

break elements of t lent lamp,

of which the following is anism for incandescent lights UNITED STATES TE T OFFICE.

ROY E. KIMBaLL, or FRUITVALE, CALIFORNIA.

INCANDESGENT-LAMP co'N'rRo To all whom it may concern:

' Be a known that I, ROY E. KIMBALL, citi at Fruitv'ale,"

zen of United States, residing in the county of Ala1neda an State of California, have invented new and useful 'Im' provements in Incandescent-Lamp Control,

My invention relates to Fig. 1 showing a modified form of thedevice. Fig. 4 is a horizontal section of Fig. 3 Fig. 5 is a erspective view of the key shown in Fig. 3. ig. 6 is a perspective ofthe make and e lamp. Fig. 7 is a detail perspective View showing the cams -18 and 19 on their connecting plate.

It is the object of my invention toprovide means whereby anincandescen't or equivaor a series of the same, may be lighted or extinguished, by means of a distant switch, and independent of the local switch whereby any lamp may be lighted or extinguished.

- In the drawing A represents a threaded A lamp socket into which the transparent bulb B is secured, and C shows the contact throu h which the filament of the lamp is ordinarfiy made incandescent by the current throu h the wires 2 and 3.

In t e drawing the wire connects throu I h the arm or bar 4, with one member f t e circuit, and the other member which is insulated therefrom connects through a rod or bar 6, and with the wire 3 which continues the circuit. The circuit through the wire 3 connects with the contacts 7 and 8 of adistant switch, and when the switch button 9 is turnediso that the arms '10 are in contact with the points 7 and 8, connection will be made therethrough, thence through a connection 11 to a point 12, thence through the return wire 13. 14 is another connecting passing wire leading from the lamp socket A to a contact point 12, and this contact point is diametrically opposed to'the'contact 12. Thus it will be seen that when the button 9 is turned at right angles to the position show-n Specification of Letters Patent. Ap nman filed an 30.1906. Serial Nosoa.s'ao.

Fig. 3 is a section similar to pressed earns 18 and 19 which are which extends through an as-sea 18,1908.

in which the-points '7 and 8 are connected, the arms 1 0 being turned with the button to the point at right 1212 Thus the circuit which normally passesthrough the lamp by means of the wires 2 3 and 1-3 will be caused to pass through by' means of the'wires 2-.1413;

the turning of the switch button 9 just previously mentioned, causing this change in the lineof the currenti I In order'to make the necessary connections pull chain, as shown at 15., with suitable cam connections, or I may use the turnable button, as at 15 Fig. 3.

In Fig. 2, 16'1 7 are two fixed, inclined or camshaped surfaces, one of which forms a angles, will connect the points Wlthin the lamp socket, I may use either a v 7 contact through 3, and the other through 14 i as follows: Revoluble with relation to the inclined surfaces ,16 and 17 are two springlocated beneath an insulating disk 20. This disk has a connection at one" side for a pull-chain 15 opening in the side of -the socket as shown. spiral and torsional spring 23 has its upper disk 20 so that when the chain is pulled the sprlng 1S twisted and a torsional strain brought upon it which, when the chain'is re-' leased, returns the part to its-normal osition. Arms or cams l8 and 19 surround the stem 6 beneath the insulating disk 20, and pawls 22 carried by the disk engage the ratchet teeth 21 on the surface of the part which carries the cams 18 19. The spiral s ring 23' also serves to press the art 20 own so that the pawl teeth 22 wil be engaged with the ratchet teeth 21, and thus turn the arms 18*19 when the chain is pulled. Each pull of the chain produces a 'quarter revolution of the device, and the arms 18-19 will be alternately brought into contact withthe inclined surfaces 1617 as follows: Fig. 2 shows the relative position of the cams 16-17, their position being 90 degrees apart. Thus when the cam 18 is drawn end fixed, and j its lower end connecting with the insulating y the first pull of the chain to contact with the incline 17, the incline 19 will be out of contact with either. The next pull will carry 18 around to a oint where it will contact with 16. 19 wil still be out of contact with either: When 18 has been again moved b another turn'to clear 16, 19 will be in readiness to go into contact with 17 and .thus a continuation of 'ulls will cause these two cams to alternately contact with the inclined surfaces as described. 4

When the insulating disk is turned by" the pull upon the chain, the pawls 22 will engage the notched or ratchet disk 21, and will turn it and the cams 1819. The cam 18 will-then first contact with the plate 17, and

a current will then be transmitted through the Wire 2, arm a, contact 5, lamp filament, plate 0, rod 6 and cam 18 which surrounds the rod, thence through the plate '17, the wire'3, and the switch contacts 7812 to the wire 13. The next turn disengages the cam 18 from the contact 17, thus extinguishing the light,.and carrying the cam 18 into contact wlth the arm 16. This establishes a second circuit through the distant switch, so that when it is desired to light the lamp from that point it will only-be necessary to turn the button 9 to bring the arms 10 into contact with the points 12'12* "when the circuit I be established throu h the wire 2, arm 4,

contact 5, filament and p ate C, rod 6, cam 18 surrounding it, plate 16,- thence through the :wire 14,0ontact points 12 12 and the wire 13, and in this condition the lamps may be lighted directlyfiom the distant switch Without reference to the fact that the lamp was extinguished and the circuit cut oif at the 'lamp itself. It will. now be obvious-from the previous description that when by continued revolution-the cam 18 has been carried beyond the arm 16, that the cam 19 will be in readiness to take up the work, and will in like manner produce the afore described operationsuntil it has passed the arms 17-.

16. When the device turned iurtherso as to disengage these lates,'the lamp will be extinguished. The amp will thus be lighted or extinguished by the pull upon the chain. When however by the pull upon the chain, the lamp has been extinguished, the circuit through the wire 3, the point 7.81'2 will be out off, and a circuit may be established through the wire 14, the points 12'12, so that when it is desired to again light the lamp it will only be necessary to turn the button9 to bring the arms 10 into contact with the points 12-12 when the -circuit will be established through the wire 2, arm i, contact 16 and 18, wire 14, points 12 -12 and wire 13, and thus the lamps may be lighted directly from the distant switch without reference. to

states thefact that the lamp was extinguished, and the circuit cut ofi at the lamp itself In the construction shown at Fig. 3, the

circuits are completed and broken by the .turning of the button 1'5 -and the cams 25 and 26 which are mounted upon the shaft 27 so as to be turned by thebutton. The cam 25 is. fixed to the shaft 27, transmits the current from the wire 3, and its 0st to the filament, thence through O'an the wire 2 as previously described. -By turning the button 15*, the cam 25 will be turned a quarter revolution, and disengage its'contacts, and

- the cam 26 which stands at right angles with 25 will be turned into position to complete its circuit. This cam is insulated fromthe shaft 27, and when the circuit just traced has been broken, this cam 26 completes a circuit throughvthe wire 14;, cam 26.and fila ment, plate 0 and the wire 2. cams, as 26, should be insulated from the shaft 27, as shown at 28,

Having thus described Que of the 1 my invention, what I claim and desire to secure by Letters Patcut is 1. Inan apparatus of the character de scribed, a lamp socket with a plurality of scribed, a lamp socketfa main circuit, local means to complete and interru t the circuit, said-means including a turnab eratchet disk with arms, fixed independently connected conducting surfaces with which said arms are caused to successively contact when turned, and connections between the main circuit-through the lamp, and the conducting surfaces.

' Intestimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

.Witnesses:

S. H. Noussn, HENRY P. Tarcou. 

